It's kind of fun pretending to be an inventor
I haven't realized it before, but keeping the matter of the river from Natha was actually quite stressful. It weighed heavily on my conscience; I already felt like a liar due to my transmigration identity, so keeping any more secrets made me queasy.
Once that was out of my system, I felt terribly refreshed and light-hearted. I had to endure the embarrassment when the others came back and found me in Natha's lap, but otherwise, I left the Lord Castle feeling better than ever.
And so, while my mind was still clear and refreshed, I finally decided to tackle the pseudo-modern failed products--the project I had been neglecting since I came back.